[問題] 書上範例的問題

[negotiate (negotiate)]

這個範例是選取SD卡中的照片再顯示在Imageview中

放到手機執行的話第一次選取很正常

但是直接再按Picture選取一次的話他就會直接中止程式

我想請問如果我想要把它改成可以再更改一次圖片的話要怎麼做呢?

程式碼好像不算長我就直接貼了

或是我有把這個範例上傳 網址http://www.badongo.com/file/25710607

麻煩大家指點了

public class EX07_06 extends Activity
{
  private Button myButton01;
  private ImageView myImageView01;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    myImageView01 = (ImageView) findViewById(R.id.myImageView01);
    myButton01 = (Button) findViewById(R.id.myButton01);

    myButton01.setOnClickListener(new Button.OnClickListener()
    {

      @Override
      public void onClick(View arg0)
      {
        Intent intent = new Intent();
        /* 開啟Pictures畫面Type設定為image */
        intent.setType("image/*");
        /* 使用Intent.ACTION_GET_CONTENT這個Action */
        intent.setAction(Intent.ACTION_GET_CONTENT);
        /* 取得相片後返回本畫面 */
        startActivityForResult(intent, 1);
      }
    });

  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode,
      Intent data)
  {
    if (resultCode == RESULT_OK)
    {
      Uri uri = data.getData();
      ContentResolver cr = this.getContentResolver();

      try
      {
        Bitmap bitmap = BitmapFactory.decodeStream(cr
            .openInputStream(uri));
        /* 將Bitmap設定到ImageView */
        myImageView01.setImageBitmap(bitmap);

      } catch (FileNotFoundException e)
      {
        e.printStackTrace();
      }
    }
    super.onActivityResult(requestCode, resultCode, data);
  }
}

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